 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
.NET Forum / Languages / C# / October 2007Copy byte array to other
Hello. How I can copy one byte array to other byte array? For example I have byte[] array1 = new byte[500]; byte[] array2 = new byte[100]; in array1 I have useful data from position 55 to 105 and I need copy those bytes to array2 on position from 15 to 65. How to do this? There are should be some function which work like "copy" function in C++. SushiSean, You would use the static BlockCopy method on the Buffer class, like so: Buffer.BlockCopy(array1, 55, 51, array2, 15, 51);  Signature- Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com > Hello. How I can copy one byte array to other byte array? > [quoted text clipped - 7 lines] > How to do this? There are should be some function which work like "copy" > function in C++. > SushiSean, > > You would use the static BlockCopy method on the Buffer class, like so: > > Buffer.BlockCopy(array1, 55, 51, array2, 15, 51); Not to dispute the usefulness of Buffer.BlockCopy(), but it seems to me that in this case, where one is simply copying from one array to another, the Array.Copy() method would be preferable (if nothing else, just from a readability point of view): Array.Copy(array1, 55, array2, 15, 51); Also, I think that if one is using Buffer.BlockCopy(), the correct parameter list is this (basically the same as Array.Copy()): Buffer.BlockCopy(array1, 55, array2, 15, 51); Any particular reason for preferring Buffer.BlockCopy()? I prefer Array.Copy() because it's a method that already exists in the class for the data type being used (even if it is a static method). Is there something about BlockCopy() that makes it better? Pete Hi, >> SushiSean, > Any particular reason for preferring Buffer.BlockCopy()? I prefer > Array.Copy() because it's a method that already exists in the class for > the data type being used (even if it is a static method). Is there > something about BlockCopy() that makes it better? I think I read somewhere (or maybe here in an older post) that BlockCopy simply use an equivalent of memcpy, on other words it just copy a chunk of bytes. Array.Copy takes into account the type of the array (to deal with different sizes in memory). Basically Array.Copy you go by index, wheater in BlockCopy is just a byte copying method. So BlockCopy should be faster. Disclaimer: The above is from memory, I haven't check the docs nor the dissassambled code to check it. > Hello. How I can copy one byte array to other byte array? > [quoted text clipped - 7 lines] > How to do this? There are should be some function which work like "copy" > function in C++. Buffer.BlockCopy will do it. Sorry, I sent the first post before finishing it. > Hello. How I can copy one byte array to other byte array? > [quoted text clipped - 7 lines] > How to do this? There are should be some function which work like "copy" > function in C++. Also take a look at the several Array.Copy methods. You can use the static method "Copy" on the Array class. Like this: Array.Copy(source,55,dest,15,50); See http://msdn2.microsoft.com/en-us/library/system.array.copy.aspx > Hello. How I can copy one byte array to other byte array? > [quoted text clipped - 7 lines] > How to do this? There are should be some function which work like "copy" > function in C++. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
|
Reply to this Message
|
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.